Icon for a display screen



FIG. 1 is a front view of a first image of an icon for a display screen,showing my design;

FIG. 2 is a front view of a second image thereof;

FIG. 3 is a front view of a third image thereof; and,

FIG. 4 is a front view of a fourth image thereof.

The broken lines showing of the display screen are for the purpose ofillustrating environmental structure and form no part of the claimeddesign.

The ornamental design for an icon for a display screen, as shown anddescribed.